Settings of the Message boards module are located in Site Manager -> Settings -> Community -> Message boards. Among other community-related settings, the following settings are related to the Message boards module:

 

•Board unsubscription URL - URL of the site on which the Message board unsubscription web part is placed; this web part handles requests for unsubscription from notifications about new message board messages

•Send message board e-mails from - e-mail address that will appear in the From field of notification messages about new message board messages

•Board base URL - global board base URL that can be inherited by message boards; it can be used by board notification e-mails and message board viewers